/**
 * Copyright 2008 Mathias Doenitz, http://lis.to/
 *
 * This file is part of the lis.to java desktop client. The lis.to java desktop client is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * The lis.to java desktop client is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with the lis.to java desktop client.
 * If not, see http://www.gnu.org/licenses/
 */

package listo.client.dialogs.controllers;

import com.google.inject.Inject;
import listo.client.Lang;
import listo.utils.swing.AutoCompleter;
import listo.client.dialogs.autocompletion.DueTimeCompleter;
import listo.client.model.Task;
import listo.utils.guice.ManuallyScoped;
import listo.utils.types.Cal;
import listo.utils.types.DateTime;
import org.apache.commons.lang.StringUtils;

import javax.swing.*;
import javax.swing.text.JTextComponent;
import java.awt.*;
import java.text.DateFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

@ManuallyScoped("TaskDialogScope")
public class TaskDueTimeController extends TextComponentController<Task>
        implements ComponentController.ModelChangedListener {

    // we want to parse the following time formats:
    // HH:
    // HH:mm
    // H:mm
    // HH
    // HHmm
    // Hmm
    private static final Pattern PATTERN = Pattern.compile("\\A(\\d{1,2}?):?(\\z|\\d{2})");

    private final DueTimeCompleter completer;
    private final DateFormat timeFormat;

    @Inject
    public TaskDueTimeController(DueTimeCompleter completer, Lang lang, TaskReminderController reminderController) {
        this.completer = completer;
        this.timeFormat = lang.getTimeFormat();

        reminderController.addModelChangedListener(this);
    }

    public void setDialogComponent(JDialog dialog, JComponent component) {
        super.setDialogComponent(dialog, component);
        new AutoCompleter(completer).decorate(dialog, (JTextComponent) component);
    }

    protected void updateView(boolean active) {
        String text;
        if (modelObject.hasDueTime()) {
            text = modelObject.getDue().format(timeFormat);
            textComponent.setForeground(SystemColor.textText);
        } else {
            text = active ? "" : "None";
            textComponent.setForeground(active ? SystemColor.textText : SystemColor.textInactiveText);
        }

        setText(text);
    }

    protected void extractFromString(String string) {
        if (StringUtils.isEmpty(string)) {
            modelObject.setDueTime(null);
            return;
        }

        try {
            DateTime time;
            try {
                // first try a full format match
                time = DateTime.parse(string, timeFormat);
            } catch (Exception e) {
                Matcher matcher = PATTERN.matcher(string);
                if (!matcher.matches()) throw new NumberFormatException();

                int hour = Integer.parseInt(matcher.group(1));
                int minutes = StringUtils.isNotEmpty(matcher.group(2)) ? Integer.parseInt(matcher.group(2)) : 0;
                time = new Cal().set(hour, minutes, 0, 0).getDateTime();
            }
            modelObject.setDueTime(time);
        }
        catch (NumberFormatException e) {
            modelObject.setDueTime(null);
        }
    }

    public boolean isComponentValid() {
        return !modelObject.hasReminder() || modelObject.hasDueTime();
    }

    public void modelChanged(ComponentController... controllers) {
        updateView(false);
        if (controllers[0] instanceof TaskReminderController || controllers[0] instanceof TaskQuickEntryController) {
            fireModelChanged(controllers);
        }
    }
}
